Patents by Inventor Lawrence D. Rosenthal

Lawrence D. Rosenthal has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Acoustic finding system
    Patent number: 6573833
    Abstract: A lost item finding system including at least two nearly identical locators. Either one can be used to find the other and whatever items are attached to it. The available locator broadcast to the lost one an acoustic search signal including a sequence of tones having predetermined frequency differences between them. The lost locator determines the baseline frequency and then identifies whether the signal conforms to the predetermined tone sequence and then transmits a beacon signal that can be perceived by the user as he searches for the lost item. The beacon signal may include both an audible signal and a flashing light emitting diode. Advantageously, both the transmission and reception of the audio signal is accomplished with one piezoelectric transducer, and the efficiency of the transducer is increased by forming a resonant cavity having a cap both protecting the piezoelectric transducer and forming an annular side port.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: June 3, 2003
    Inventor: Lawrence D. Rosenthal
  • Paired lost item finding system
    Patent number: 6366202
    Abstract: A lost item finding system including at least two nearly identical locators. Either one can be used to find the other and whatever items are attached to it. In the preferred embodiment, acoustic signals near 6500 Hz are used to broadcast a search signal from an available locator to a lost one. Preferably, the search signal includes a sequences of tones having predetermined frequency differences between them. The lost locator is usually in a sleep mode, in which it nonetheless is capable of recognizing the beginning of the search signal. The locator turns on to an active mode in which it consumes more power. It determines the baseline frequency and then identifies whether the signal it is receiving conforms to the predetermined frequency differences between the sequence of tones. If it does, the lost locator transmits a beacon signal that can be perceived by the user as he searches for the lost item. The beacon signal may include both an audible signal and a flashing light emitting diode.
    Type: Grant
    Filed: September 1, 2000
    Date of Patent: April 2, 2002
    Inventor: Lawrence D. Rosenthal
  • ROM socket communication device for data transfer beween a host computer and a microprocessor based system
    Patent number: 5287455
    Abstract: A transfer utility 18 provides for the transfer of data from a host computer 20 to the ROM socket 30 of a microprocessor based target system 28. The transfer occurs through an interface board 26 which includes a ROM socket 42 for mounting an option optional ROM 44.
    Type: Grant
    Filed: May 2, 1991
    Date of Patent: February 15, 1994
    Inventor: Lawrence D. Rosenthal